This question already has answers here:
Servlet returns "HTTP Status 404 The requested resource (/servlet) is not available"
(19 answers)
Closed 5 years ago.
i have been tring to send a request to my configured servlet from my JSP file, but i keep getting error 404 - The requested resource is not available.
i know that this question have been asked several times but it seems like none of the answer solved the problem for me.
i'm using IntelliJ ide with tomcat 9 and Java maven project.
my servlet named ControllerServlet config is:
#WebServlet(name = "ControllerServlet", urlPatterns = {"/category", "/addToCart", "/viewCart","/updateCart", "/checkout", "/purchase"},loadOnStartup = 1)
my pom.xml file have those dependencies:
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<dependencies>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>3.1.0</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>6.0.6</version>
</dependency>
</dependencies>
my project tree structure is like so:
pcstore
-src
-main
-java
-com
-pcStore
-controller
-ControllerServlet.java
-web
-WEB-INF
-view
-category.jsp
-web.xml
-index.jsp
-pom.xml
i was trying almost anything but ended up with no dice.
my context root is /pcStore , and i hit pcStore/category?{id} this is part of the servlet, i just want to pile up too much unnessesary code:
#Override
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
//checks in which path the request is
String userPath = request.getServletPath();
// if category page is requested
if (userPath.equals("/category")) {
check if you have some collistions between your classpath jars and maven's.
maybe you should try to copy the same project and try to run a sample servlet using module source without Maven or vice versa.
Related
I am new to Selenium. I am trying to run a script in a Maven Project. And I get the Error . Please help.
My pom.xml
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>EMS_Quality_and_Testing</groupId>
<artifactId>EMSSanitySuite</artifactId>
<version>0.0.1-SNAPSHOT</version>
<dependencies>
<!-- https://mvnrepository.com/artifact/org.seleniumhq.selenium/selenium-java -->
<dependency>
<groupId>org.seleniumhq.selenium</groupId>
<artifactId>selenium-java</artifactId>
<version>4.2.0</version>
</dependency>
<!-- https://mvnrepository.com/artifact/io.github.bonigarcia/webdrivermanager -->
<dependency>
<groupId>io.github.bonigarcia</groupId>
<artifactId>webdrivermanager</artifactId>
<version>5.2.0</version>
</dependency>
</dependencies>
</project>
My Code to open Google page
package Sanity;
import io.github.bonigarcia.wdm.WebDriverManager;
import org.openqa.selenium.chrome.ChromeDriver;
public class PageOpenTest {
public static void main(String[] args) throws InterruptedException
{
System.out.println("1");
/* Providing the path for the browser driver download instead of the default folder path "~/.cache/selenium" */
WebDriverManager.chromedriver().cachePath("D:\\Browser Drivers for Maven Project").setup();
/* Printing the browser driver download path */
System.out.println("Browser Driver downloaded location is -------- " + WebDriverManager.chromedriver().getDownloadedDriverPath());
// Initiating the webDriver with Chrome Browser //
ChromeDriver driver = new ChromeDriver();
System.out.println("3");
//Assigning the google URL to the variable //
String googleHomePage = "https://www.google.com/";
// Opening Google on Chrome browser //
driver.get(googleHomePage);
Thread.sleep(2000);
}
}
When I execute the code I get the error "Could not start a new session. Possible causes are invalid address of the remote server or browser start-up failure.", but I still have the browser driver downloaded to the path folder - D:\Browser Drivers for Maven Project. As per the screenshot.
Problem
I build an application using a Neo4j database. I like to test some custom Cypher queries using Spring Boot's #DataNeo4jTest annotation (see also Spring Boot Test - Neo4j), but I run in either one of the following problems:
The test tries to connect to a Neo4j instance using the BOLT driver.
The test fails to load the embedded driver.
Details
My dependencies are managed with Maven following the Spring Data Neo4j Reference Documentation. Section 10.3.1 of the SDN documentation explains:
By default, SDN will use the BOLT driver to connect to Neo4j and you don’t need to declare it as a separate dependency in your pom. If you want to use the embedded or HTTP drivers in your production application, you must add the following dependencies as well. (This dependency on the embedded driver is not required if you only want to use the embedded driver for testing. See the section on Testing below for more information).
Therefore, the relevant parts of my pom.xml are:
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns:xsi=...>
...
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.0.0.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<properties>
...
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-neo4j</artifactId>
</dependency>
<dependency>
<groupId>org.neo4j.test</groupId>
<artifactId>neo4j-harness</artifactId>
<version>3.3.4</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
...
</project>
My main/resources/application.yml is:
spring:
data:
neo4j:
uri: bolt://localhost
username: <username>
password: <password>
My test/resources/application.yml is:
spring.data.neo4j.uri: file:///neo4j.db
Without the test/resources/application.yml I get the following exception, which I assume is caused by using the BOLT driver:
org.springframework.transaction.CannotCreateTransactionException: Could not open Neo4j Session for transaction;
nested exception is org.neo4j.driver.v1.exceptions.AuthenticationException: The client is unauthorized due to authentication failure.
With the test/resources/application.yml I get the following exception:
java.lang.IllegalStateException: Failed to load ApplicationContext
Caused by: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'neo4jAuditionBeanFactoryPostProcessor': Unsatisfied dependency expressed through constructor parameter 0;
nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sessionFactory' defined in class path resource [org/springframework/boot/autoconfigure/data/neo4j/Neo4jDataAutoConfiguration.class]: Bean instantiation via factory method failed;
nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.neo4j.ogm.session.SessionFactory]: Factory method 'sessionFactory' threw exception;
nested exception is org.neo4j.ogm.exception.core.ConfigurationException: Could not load driver class org.neo4j.ogm.drivers.embedded.driver.EmbeddedDriver
Questions
Are there any dependencies missing?
Is the configuration wrong?
Does anyone have a link to a working example using the Spring Boot annotation #DataNeo4jTest?
Any suggestion is welcome.
I have found a solution to my problem. It seems as if the BOLT driver is used as default for testing as well - which is confusing given the Spring Data Neo4j (SDN) documentation. Finally, the pom.xml of the GitHub project movies-java-spring-data-neo4j helped me. I added the following test dependency to my pom.xml:
<dependency>
<groupId>org.neo4j</groupId>
<artifactId>neo4j-ogm-embedded-driver</artifactId>
<version>${neo4j-ogm.version}</version>
<scope>test</scope>
</dependency>
I kept the test/resources/application.yml but removed the line:
spring.data.neo4j.uri: file:///neo4j.db
Now, the test context starts with the embedded driver, and creates a temporary database file like file:/C:/Users/Me/AppData/Local/Temp/neo4j.db6943517458205762238/, which is awesome. I can get a clean database instance for every test method.
I hope this answer will help others, who have the same problem. I'm happy to provide more details if necessary.
#DataNeo4JTest works great with Spring Boot 2.x.
Example Test:
#RunWith(SpringRunner.class)
#DataNeo4jTest
public class WidgetRepositoryTest {
#Autowired
private WidgetRepository repository;
private Widget widget;
#Before
public void setUp() {
widget = WidgetTestData.builder().build();
}
#Test
public void itShouldSaveAndRetrieve() {
final Widget saved = repository.save(widget);
assertThat(saved.getId()).isNotNull();
assertThat(saved.getName()).isEqualTo(widget.getName());
final Optional<Widget> found = repository.findById(saved.getId());
assertThat(found).hasValueSatisfying(w-> {
assertThat(w.getId()).isEqualTo(saved.getId());
assertThat(w.getName()).isEqualTo(saved.getName());
});
}
}
The Neo4J-related dependencies in my Maven POM:
<dependency>
<groupId>org.neo4j.test</groupId>
<artifactId>neo4j-harness</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.neo4j</groupId>
<artifactId>neo4j-ogm-embedded-driver</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-neo4j</artifactId>
</dependency>
I m new to spring. I was writing spring boot applications with maven in last few days and had no issue in building or running on windows with STS. Then today for packaging i created a new project and and tried to build it with maven using win command prompt. Build failed and said that theres no compiler set("Perhaps your'e using a JRE"). Then I set JAVA_HOME in system variables and retried but then it started giving me
SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder"
SLF4J: Defaulting to no-operation (NOP) logger implementation
....
Caused by:
java.lang.ClassNotFoundException:ch.qos.logback.classic.turbo.TurboFilter
Now I can't run any app which were working fine earlier either with STS/Eclipse, that error pops up.
I deleted .m2 and rebuilt.still not working.
Tried in a different windows pc with a fresh STS installation. It also doesn't work. this pops up.
Did they change libraries?
I deleted JAVA_HOME and retried.But no success.
I'm using a pretty simple pom and an application.
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.pmanu</groupId>
<artifactId>testMaven</artifactId>
<version>0.0.1-SNAPSHOT</version>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.5.6.RELEASE</version>
</parent>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
</dependencies>
<properties>
<java.version>1.8</java.version>
</properties>
</project>
AppStart.java
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
#RestController
#SpringBootApplication
public class AppStart {
public static void main(String[] args) {
SpringApplication.run(AppStart.class, args);
}
#RequestMapping("/")
public String get(){
return "Hello";
}
}
Please Help. I'd prefer to go ahead with spring 1.5.6.RELEASE artifacts.
I saw some answers saying that a logging jar like log4j has to be added to classpath.
But isn't maven parent supposed to have them configured? If there's any other proper way I'd prefer not to add an unnecessay dependancy for my applications.
How come this arised all of a sudden?
I am new to spring, so i downloaded jar from spring intializr for maven-web java 1.8 demo. I extracted and imported it to STS to run the main() file and I get below exception. Can some one tell me what's solution for this?
Solutions I tried from web but didn't work:
- Tried adding Hibernate-validator dependency to pom
- Tried adding spring-boot-starter-tomcat dependency to pom
STACK TRACE:
2017-01-26 12:19:32.587 INFO 3816 --- [ main] ationConfigEmbeddedWebApplicationContext : Refreshing org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext#2e4b8173: startup date [Thu Jan 26 12:19:32 EST 2017]; root of context hierarchy
2017-01-26 12:19:36.442 WARN 3816 --- [ main] ationConfigEmbeddedWebApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.context.ApplicationContextException: Unable to start embedded container; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'tomcatEmbeddedServletContainerFactory' defined in class path resource [org/springframework/boot/autoconfigure/web/EmbeddedServletContainerAutoConfiguration$EmbeddedTomcat.class]: Initialization of bean failed; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'org.springframework.boot.autoconfigure.web.HttpEncodingAutoConfiguration': Unsatisfied dependency expressed through constructor parameter 0; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'spring.http.encoding-org.springframework.boot.autoconfigure.web.HttpEncodingProperties': Initialization of bean failed; nested exception is javax.validation.ValidationException: Unable to create a Configuration, because no Bean Validation provider could be found. Add a provider like Hibernate Validator (RI) to your classpath.
2017-01-26 12:19:36.454 ERROR 3816 --- [ main] o.s.b.d.LoggingFailureAnalysisReporter :
***************************
APPLICATION FAILED TO START
***************************
Description:
The Bean Validation API is on the classpath but no implementation could be found
Action:
Add an implementation, such as Hibernate Validator, to the classpath
Pom.xml
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.example</groupId>
<artifactId>demo</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>demo</name>
<description>Demo project for Spring Boot</description>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.4.3.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
Application file:
package com.example;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
#SpringBootApplication
public class DemoApplication {
public static void main(String[] args) {
SpringApplication.run(DemoApplication.class, args);
}
}
Had the same problem with release version 1.5.9 of Spring Boot.
To add to the answer by Jim Kiley, you should add the following in Maven pom.xml:
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-validator</artifactId>
<version>5.3.6.Final</version>
</dependency>
You can use the dependency version under properties section of Spring Boot pom.xml file (spring-boot-dependencies-1.5.9.RELEASE.pom):
<hibernate-validator.version>5.3.6.Final</hibernate-validator.version>
Located under path:
/.m2/repository/org/springframework/boot/spring-boot-dependencies/1.5.9.RELEASE/spring-boot-dependencies-1.5.9.RELEASE.pom
As the output says, you need to:
Add an implementation, such as Hibernate Validator, to the classpath
Since you're using Maven, that means you need to add the Hibernate Validator to your pom.xml's dependencies.
First of all, your pom.xml settings are correct.
spring-boot-starter-web has the dependency to hibernate-validator.
So in your project, you don't need to specify the dependency to hibernate-validator. Otherwise, what's the purpose to use maven?
So back to the resolution, the steps I did to resolve the problem are:
Goto project folder where the pom.xml is located.
Run mvn verify
The command will download the missing jar again from the repository and also check the correctness(corrupted or not) of jars in maven local repository.
If you see the warning messages similar to following:
[WARNING] error reading /home/vagrant/.m2/repository/org/apache/tomcat/embed/tomcat-embed-core/8.5.6/tomcat-embed-core-8.5.6.jar; invalid LOC header (bad signature)
[WARNING] error reading /home/vagrant/.m2/repository/org/hibernate/hibernate-validator/5.2.4.Final/hibernate-validator-5.2.4.Final.jar; invalid LOC header (bad signature)
[WARNING] error reading /home/vagrant/.m2/repository/com/fasterxml/jackson/core/jackson-core/2.8.4/jackson-core-2.8.4.jar; invalid LOC header (bad signature)
Then this means that the jars downloaded by maven previously has been corrupted.
To correct this, please delete those corrupted jars and run mvn verify again to re-download them and also ensure that there's no warning for jars.
Go back to your IDE(STS or Eclipse), update your project and run the application again.
In above error the hibernate-validator-5.2.4.Final.jar is the hibernate validator that in quesion.
I met same issue and resolved it by delete these two folders under .m2
com\fasterxml --> delete it will resolve TypeResovler issue.
org\springframework --> delete it will resolve lack of validator
issue.
then the program works.
I faced the same issue while runs the application and resolved the issue by deleting the .m2 folder.
.m2/repository
I couldn't use elasticsearch Java API through JSP. In the following, I have tried to explain what I have done. :|
I have installed elasticseach 2.3.3 on my system by following the elastic instruction and run it from command prompt. everything is working perfectly. It may be useful to say, I have changed below parameters from elasticsearch.yml.
cluster.name: cluster_233
node.name: node_233
bootstrap.mlockall: true
network.host: 127.0.0.1
Then with Netbeans, I have created a Maven project -> Web application project and set the below dependency in pom.xml :
<dependency>
<groupId>org.elasticsearch</groupId>
<artifactId>elasticsearch</artifactId>
<version>2.3.3</version>
<type>jar</type>
</dependency>
Also I have added the Guava version 18 dependency into project and then download all the project dependencies by right clicking on Dependencies and select Download Declared Dependencies . Then created a java class and write below code:
package com.mycompany.esmaven;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;
import org.elasticsearch.client.Client;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.node.Node;
import org.elasticsearch.node.NodeBuilder;
public class aClass {
public String test() throws Exception {
String str = tryToIndex();
String dfd = "";
return str;
}
public String tryToIndex() throws Exception {
Node node = NodeBuilder.nodeBuilder().settings(
Settings.builder()
.put("path.home", "d:/elasticsearch-2.3.3")
.put("cluster.home", "cluster_233")
).node();
Client client = node.client();
client.prepareIndex("kodcucom", "article", "1")
.setSource(putJsonDocument("ElasticSearch: Java API",
"ElasticSearch provides the Java API, all operations "
+ "can be executed asynchronously using a client object.",
new Date(),
new String[]{"elasticsearch"},
"Hüseyin Akdoğan")).execute().actionGet();
node.close();
return "Done";
}
public static Map<String, Object> putJsonDocument(String title,
String content, Date postDate, String[] tags, String author) {
Map<String, Object> jsonDocument = new HashMap<String, Object>();
jsonDocument.put("title", title);
jsonDocument.put("conten", content);
jsonDocument.put("postDate", postDate);
jsonDocument.put("tags", tags);
jsonDocument.put("author", author);
return jsonDocument;
}
}
And through a jsp page tried to call the test() function (I'm going to integrate elasticsearch with a web application). Always after building the project at the first load the below error will appear:
java.lang.NoSuchMethodError: com.google.common.util.concurrent.MoreExecutors.directExecutor()Ljava/util/concurrent/Executor;
and after refreshing the page the context of error will change to:
java.lang.NoClassDefFoundError: Could not initialize class org.elasticsearch.threadpool.ThreadPool
This is the POM:
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.ISTEX</groupId>
<artifactId>mvnESwebapp</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>war</packaging>
<name>mvnESwebapp</name>
<properties>
<endorsed.dir>${project.build.directory}/endorsed</endorsed.dir>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-shade-plugin</artifactId>
<version>2.4.1</version>
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>shade</goal>
</goals>
<configuration>
<transformers>
<transformer implementation="org.apache.maven.plugins.shade.resource.ServicesResourceTransformer"/>
</transformers>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>
<dependencies>
<dependency>
<groupId>org.elasticsearch</groupId>
<artifactId>elasticsearch</artifactId>
<version>2.3.3</version>
</dependency>
<dependency>
<groupId>javax</groupId>
<artifactId>javaee-web-api</artifactId>
<version>7.0</version>
<scope>provided</scope>
</dependency>
</dependencies>
</project>
Also, I would like to mention, with this POM I can index my JSON from the main function. But the problem is I did not know how to run the application through JSP pages.
I really appreciate you for sharing your knowledge.
Regards,
Amin
FWIW, I ran into the same issue as described above -- that is, the error message I saw was the threadpool initialization error the author describes. The solution described in the link below solved the problem for me:
https://discuss.elastic.co/t/could-not-initialize-class-org-elasticsearch-threadpool-threadpool/47575
UPDATED per comment suggestion:
In my case, the fix was to add a guava dependency entry in my POM file. I used the dependency given in the webpage at the link above:
<dependency>
<groupId>com.google.guava</groupId>
<artifactId>guava</artifactId>
<version>19.0</version>
</dependency>
That, at least in my case, solved the problem.
With Java applications, errors like
java.lang.NoSuchMethodError
java.lang.NoClassDefFoundError
generally indicate that you are missing a dependency or you have conflicting dependency. For example, Guava 18.0 and Guava 19.0 are completely different as far as Java is concerned, but they share a lot of code. As the jars are loaded, one will naturally be loaded first, so any attempted usage of the second will cause misleading errors like those above.
Also I have added the Guava version 18 dependency into project and then download all the project dependencies by right clicking on Dependencies and select Download Declared Dependencies
Elasticsearch 2.3.3 already depends on Guava 18.0. As such, it's a transitive dependency of the Elasticsearch project.
<dependency>
<groupId>org.elasticsearch</groupId>
<artifactId>elasticsearch</artifactId>
<version>2.3.3</version>
<type>jar</type>
</dependency>
Your Maven dependency is probably creating a collision with one of your other dependencies. Take a look at your Netbeans dependencies, or more appropriately ask Maven to do it directly:
mvn dependency:tree -Dverbose
This will print out the dependency tree for you to find conflicts. Look for jars that are duplicated with different versions and stop the mismatch from happening.
As a side note, at the time of this answer, Guava 19 is the latest version. So even though ES 2.3.3 wants Guava 18, some other dependency of yours could easily and reasonably want a different version of Guava.